US4340686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbamated poly(vinyl alcohol) useful as a binder in elastomeric photopolymer compositions
Assignee: EIDP Inc
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Filing: 1981-01-13
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Granted: 1982-07-20
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Expires: 2001-01-13
Abstract
Abstract Flexographic printing plates are prepared from photosensitive elastomeric compositions which comprise (1) about 15 to about 89 percent by weight of a carbamated poly(vinyl alcohol) polymeric binder, (2) about 10 to about 70 percent by weight of a compatible monomer, and (3) about 0.1 to about 10 percent by weight of a free-radical generating system.
Inventors
- 👤 Robert P. Foss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:00
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/032; G03F7/033; C; C08; C08F; C08F8/00; C08F8/14; C08F8/30; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/106; Y10S430/107; Y10S430/11
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
156 words
A carbamated poly(vinyl alcohol) which comprises 15 to 100 mole percent of recurring units having the formula ##STR10## wherein R is NH 2 in some recurring units and at least one of OR 1 and NHR 1 in the remaining recurring units, wherein the units which contain OR 1 and NHR 1 are derived by reaction of said units wherein R is NH 2 with R 1 OH, R 1 OH being an alcohol which has a boiling point of greater than 100° C. at normal atmospheric pressure, with the proviso that said alcohol is compatible with said carbamated poly(vinyl alcohol), and the ratio of (OR 1 +NHR 1 )/NH 2 is within the range of 0.05 to 1.0, and 0 to 85 mole percent of recurring units having a formula selected from the group consisting of ##STR11## with the proviso that no more than 12 mole percent of the recurring units have the formula ##STR12##
Claim 2
Dependent Claim
156 words
A carbamated poly(vinyl alcohol) which comprises 15 to 100 mole percent of recurring units having the formula ##STR10## wherein R is NH 2 in some recurring units and at least one of OR 1 and NHR 1 in the remaining recurring units, wherein the units which contain OR 1 and NHR 1 are derived by reaction of said units wherein R is NH 2 with R 1 OH, R 1 OH being an alcohol which has a boiling point of greater than 100° C. at normal atmospheric pressure, with the proviso that said alcohol is compatible with said carbamated poly(vinyl alcohol), and the ratio of (OR 1 +NHR 1 )/NH 2 is within the range of 0.05 to 1.0, and 0 to 85 mole percent of recurring units having a formula selected from the group consisting of ##STR11## with the proviso that no more than 12 mole percent of the recurring units have the formula ##STR12##
Claim 3
Dependent Claim
57 words
The carbamated poly(vinyl alcohol) of claim 1 wherein 30 to 50 mole percent of the recurring units have the formula ##STR13## the ratio of (OR 1 +NHR 1 )/NH 2 is within the range of 0.1 to 0.3, and 50 to 70 mole percent of recurring units have a formula selected from the group consisting of ##STR14##
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-07-19 | 1986-01-18 | 1986-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-19 | 1990-01-18 | 1990-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-19 | 1994-01-18 | 1994-07-20 | $7700.00 | Window Closed / Lapsed |